The sound comes from the branding audio used by Taco Bell, where a deep bell toll closes television and online adverts and ties to the bell in the chain's logo. Shared online as the Taco Bell Bong, the isolated clip spread through meme edits, soundboards and short videos in the 2010s and beyond as a standalone reaction sting. Editors kept using it because the recognisable toll needs no setup, instantly signals a spoof-serious moment, and works even when viewers only hear the audio without any branding on screen.